Add msm7x27a display hals

copy of display hals from
https://github.com/TeamHackLG/android_hardware_qcom_display-caf/tree/cm-10.2
get rid of HAL pixelformats 5551 and 4444

Change-Id: I817510c3c7c0c3d95924c2ffc79e5727a6d6c48f